| Author | Titles | | 1.
| Roberts, Sean | 1 | | 2.
| Roberts, Simon | 1 | | 3.
| Roberts, W. | 1 | | 4.
| Roberts-Austen, W. C., Sir, 1843-1902 | 1 | | 5.
| Roberts-Austen, William Chandler, Sir, 1843-1902 | 0 | | 6.
| Author is: Roberts-Austen, W. C., Sir, 1843-1902 | 1 | | 7.
| Roberts-Jones, Françoise | 1 | | 8.
| Roberts-Jones, Françoise, 19--? | 1 | | 9.
| Roberts-Jones, Philippe, 1924- | 29 | | 10.
| Robertson, Alasdair | 1 | | 11.
| Robertson, Alec | 1 |
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